at 4:53, cnn reported that dorner was pinned down. at 4:53, they reported he is not yet in custody and we continued to hear gunfire as this battle apparently with dorner takes place. carter evans was reporting by phone. he was able to get a satellite truck into that remote area. we hope to have pictures for you as the newscast continues. we'll stay on top of it and let you know what developments there are, as this is taking place right now. >> we can only hope that there is a resolution and a resolution soon. >> now to our other big story, a university of maryland grad student goes on a shocking murder and suicide rampage, targeting his college roommate. >> we have breaking news on the background of this mentally ill shooter, including surprising ties to the space agency. the shooting broke out in the 8700 block of 36th street. two student, including the attacker, are dead. one is wounded. topper live at the crime scene with more on what was really a bizarre series of events. scott. >> shooter is identified as 23- year-old dayvon maur